What was found
DURING MAINTENANCE BASE VISIT FOUND THE CARGO DOOR CUTOUT LOWER CENTER SILL TO BE CORRODED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE CARGO DOOR CUT OUT LOWER CENTER SILL IAW EMB 140 SRM 51-40-02, 51-40-06, 51-20-03, 51-20-01. THE AIRCRAFT WAS RETURNED TO SERVICE.